Blank forming apparatus



June 1959 J. R. BAUMGARTNER 2,833,860

BLANK FORMING APPARATUS '7 Sheets-Sheet 1 Filed Jan. 27, 1955 INVENTOR.R- 4412;,-

June 2, 1959 J. R. BAUMGARTNER 2,888,860

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BLANK FORMING APPARATUS I Filed Jan. 27, 1955 Fla. '7

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QMAEAVm 7 Sheets-Sheet 4 June 1959 J. R. BAUMGARTNER 2,888,860

BLANK FORMING APPARATUS Filed Jan. 27, 1955 7 Sheets-Sheet 5 i i i i ilililili IIIIII June 1959 J. R. BAUMGARTNER 2,888,860

BLANK FORMING APPARATUS 7 Sheets-Sheet 6 Filed Jan. 27, 1955 June 1959-J. R. BAUMGARTNER BLANK FORMING APPARATUS '7 Sheets-Sheet 7 Filed Jan.27, 1955 FAc-A. l4

United Staes The invention relates to carton blank forming machines andmore particularly to the treatment of the blanked out web after itleaves the blanking press.

One of the objects of the invention is to provide an improved means forseparating the blanked out pieces of stock from the advancing web byproviding a cyclically timed means for firmly tractively gripping theback end of a blanked out section of the web so that this section may beseparated from that portion of the web in the press as that portion isblanked out by the press. Each blanked out section may be a singlecarton blank'or a multiple carton blank, in which case after themultiple blank has been separated from the web as above described, theblanks themselves are separated from each other, one at a time, by theinteraction of two sets of feed rolls with the advancing feed rollsrunning at a higher speed than those of the other set. The arrangementhereinafter described produces a better separation of the blanks thanheretofore.

A further object of the invention is to provide an improved meansincluding an impaling pin or pins for separating the waste, especiallywaste which is located in the interior of the blank. The use of impalingpins for waste separation is not broadly new, but so far as I am aware,the prior art pins have been plain cylindrical pins with more or lesspointed ends, and these do not always have the desired gripping actionon the waste so as to hold it after it has been torn from the blank.Furthermore, it has been the practice to remove the separated waste fromthe pins by passing it by a comb with the ends of the pins runningbetween the teeth with the result that definite limitations are set upfor the location of the teeth of the comb relative to the pins andbecause the width of the teeth is a factor which can prevent the bestlocation of the pin or pins relative to the waste section to be removed.Accordingto the present invention, the chance of the waste slipping offof the impaling pin has been prevented by forming the pin with what maybe termed a barbed head so that during the impaling step the waste isforced down over the enlarged end or barb of the head, and as aconsequence, is firmly gripped until it is stripped 01f. Also instead ofusing the usual comb for removing the waste from its carrying pin orpins, a flexible brush (preferably metal) is brought into engagementwith the waste to remove it, the pin preferably being designed toprovide a fulcruming point for the waste on the pin to facilitate itsremoval. Since the brush is com- The invention further consists in theseveral features hereinafter set forth and more particularly defined byclaims at the conclusion hereof.

In the drawings:

Fig. 1 is a side elevation view of that portion of a carton blankforming apparatus embodying the invention;

Fig. 2 is a plan view of the apparatus with the blank supporting meansin the waste stripping section omitted;

Fig. 3 is a vertical sectional view through the waste stripping section;

Fig. 4 is an enlarged horizontal sectional view through the wastestripping section with parts omitted;

Fig. 5 is a detailed vertical sectional view taken on the line 5-5 ofFig. 3;

Fig. 6 is a detailed vertical sectional view taken on the line 6-6 ofFig. 3;

Fig. 7 is a detailed vertical sectional view taken on the line 77 ofFig. 3;

Fig. 8 is a diagrammatic view of the drives;

Figs. 9 and 10 are diagrammatic views showing different stages of thefeed of the blank through the apparatus embodying the invention;

Fig. 11 is a progressive view of the blanks at their different stages oftreatment;

Fig. 12 is a vertical sectional view through a portion of the strippermechanism;

Fig. 13 is a view similar to Fig. 12 showing the waste removal step;

Fig. 14 is an enlarged view of parts shown in Fig. 13;

Fig. 15 is an enlarged side elevation view of an impaling p Fig. 16 is aplan view of an impaling pin.

Referring to Fig. 1 of the drawing, the letter P designates generally ablanking press having a fixed platen Pa and a movable platen Pb, and fora more detailed showing of the press, reference is made to my prior U.S.Patent No. 2,616,689, of November 4, 1952.

The letters S and D designate, respectively, the separator and strippersection and the delivery section.

The section S of the apparatus includes a pair of sets of feed belts 17and 18, each suitably supported by a series of transversely disposedrollers R in cooperative relation to feed the web W from the press, seeFigs. 9 and 10. One of the rollers R of each set of belts is positivelydriven from the press drive shaft as hereinafter described, and as in myprior U.S. Patent No. 2,655,842, of October 20, 1953, one of the rollersfor each set of belts is shiftable to tension the belt. Unlike thepatent, however, in this invention the front roller R for the lower setsof belts is mounted on arms 18a for vertical swinging movement towardand away from the web and is moved into tractive gripping engagementwith the web by the turning of its supporting shaft 19 in timed relationwith the movement of the platen Pb. For this purpose, the platen has abracket arm 20 in which a shaft 21 is suitably supported, said shaftcarrying a cylinder 22 having a spring 23 and the lower end of a plunger24, bearing on the spring, mounted therein, see Figs. 1 and 2. The uppershank end of the plunger 24 is pivotally connected to the free end of acrank arm 25 on the shaft 21 so that as the platen Pb moves upwardly, itwill through the spring 23 and plunger 24 swing the arm 25 upwardly andconsequently turn the shaft 19 and swing the arms 18a with theassociated roller R thereon upwardly so that as the last part of apreviously cut blank is moving out of the press, this part will befirmly engaged as the blank is advanced forwardly between the belts 17and 18 so that this blank will be separated from the web at the press asthe press platens come together to impress the next blank section on theweb. Fig. 9 shows the web before its separation and Fig. 10 shows theweb just after separation at the press; Thus the carton or cartonsblanked out by a single operation of the blanking press as, forinstance, the first showing Ba in Fig. 11 is cut off from the web andfed along by the opposed sets of belts 17 and 18 past the strippermechanism hereinafter described we set of feed rolls 26 and 27 whichcarry the blank relieved, of its waste to another set of feed rolls 28and 29 which rotate at a higher speed than the rolls 26 and 27 so thatif the previously cut blank is a multiple blank, the blanks willbe tornapart along their transverse division lines into single blanks asindicated in Fig. and the second and .third showings in Fig. 11. As theseparated blank section passes between the rollers 28 and 29, since therollers 28 are actually two rollers that are set at a slight anglerelative to each other, as the two part blank shown in the third showingof Fig. 11 passes between the last set of feed rolls, it will by theaction of multiple rollers 28 be torn apart transversely into the twoseparate :carton blanks shown in the fourth showing in Fig. 11, andthese blanks B will be delivered onto the conveyor .delivery belt 30indicated in Figs. 1, 9, and 10.

Referring now to the stripper portion of the section S, as the separatedblank or multiple blank passes from the feed belts 17 and 18 to the feedrolls 26 and 27, the waste is stripped therefrom while the remainder ofthe blank is supported on a series of riders 31 in theformof tensionedsteel wires, each anchored at one end by a pin projection 32 in a headblock 33 and connected at its other end to a threaded anchor member 34slidably mounted in an opening in a head block 35. A wing nut 36, inthreaded engagement with member 34 and bearing against the head block ora washer 37 abutting the same, is turned up to tension its associatedwire. Referring to Fig. 4, each of the head blocks 33 and have a seriesof spaced wire anchoring holes 33 so that the riders 33 may be arrangedin blank supporting; position in-those of its areas not to be strippedof waste, leaving the other areas open. The lower feed roll 27 may, asindicated in Fig. 6, be provided with a series of annular grooves 39 toallow free passage of the wires or riders 31. A segmental ridersupporting plate 40 provided with spaced wire engaging grooves 41 ismounted adjacent the delivery end of the belts 17 and 18 so that thewires may be defiected downwardly to their points of anchorage in block35.

A stripper pin carrying cylinder 42 is rotatably mounted in the frame ofthe machine so that the pins 43 thereon will be effective to removewaste Wa from the blank or blanks while these blanks are passing overthe horizontal support provided by the riders 31. The cylinder or drum42 is preferably a sleeve or shell of light weight metal, such asaluminum so that it may be readily tapped or threaded to take thethreaded ends 44 of the stripper pins in the exact spot or spots bestsuited to accomplish waste removal. As shown in Figs. 14- to 16, eachpin 43 has a barbed head formed by providing a conical point 45 andconical shank 46 tapering inwardly from the point to a relatively largeflat base 47 which is preferably round and extends down to the reduceddiameter threaded end 44 which is screwed into the tapped hole 49 in thedrum by the use of a rod insertable in a diametrically disposed hole 50in the base portion of the pin, the mounting as above described bringingthe head of the pin to a position directly under or flush with the wastearea portion of the blank so that as the drum 42 revolves and the pinsmove beneath the waste portion, the waste areas of the blank can bepressed down onto the heads of the pins and be impaled thereon by anysuitable means as, for example, the dense wire brush 51 revolublymounted in an axial line with that of the drum and whose outer peripheryhas a bearing engagement with the opposite side of the blank as shown inFig. 12. After the pin gets an impaling hold on the waste, its continuedmovement with the drum tears the waste Wa away from the blank andcarries it downwardly away from the body of the blank, which advances tothe feed rolls 26, and 27 while the waste Wa is carried along with thedrum to a point where it is stripped therefrom. Preferably if one pin isused or the first pin of a series of pins is used, such pin should be solocated on the cylinder 42 that it will impale the waste thereon withina distance not materially greater than the diameter of the pin toprovide a short projecting lip portion L as indicated in Fig. 14 so thatas the stripped waste Wa is carried around by the drum past a less densebut flexible revolving wire brush 52, the wires of this brush will firstcontact this lip L and bend it down while flexing the portion on theopposite side of the pin down into a fulcruming contact at F with thebase of the pin so that by the leverage action thus induced the waste ispried 01f from the pin, and in the case of a single pin drops off of thedrum, or if more than one pin, the already loosened section of the wastebeing in contact with the brush acts to tear the rest of the waste fromthe other pins. It will be noted that the waste remover brush 52 isspaced so that at one point it is almost in contact with the drum sothat as the drum revolves, the pins actually have to move through theperipheral portions of this brush, and this is more readily accomplishedand with less wear, and tear by forming the bases of the pins circularsince such a section moving through the brush more readily deflects theelements thereof. The brush 52 is driven at a higher speed than thebrush 51, and as shown in Figs. 1 and 8, its supporting shaft carries apulley 53 connected by a belt 54 with a pulley 55 on the shaft 56 of anelectric motor 57.

Referring to Figs. 8 and 5, the numeral 58 designates one of the powershafts of the blanking press which carries a sprocket 59 connected by achain 60 with a sprocket 61 on a drum drive shaft 62, which shaft issplined to a sleeve shaft 63 carrying a large gear 64 meshing with a.smaller gear 65 on the shaft 66 for the brush 51. For driving the belts17 and 18, gears 67 and 68 on the driven rollers R mesh together and areoperatively connected to the gear 65 by an idler gear 69. The feed rolls26 and 27 carry intermeshing gears 70 and 71 that are operativelyconnected by an idler gear 72 with the gear 64.

As each form of carton that may be blanked out by the machine may differfrom other forms of cartons that may be required, it is desirable toprovide means for readily attaching and detaching the pin carryingcylinder 42 from its drive mounting, and one form of means for thispurpose is shown in Fig. 5 and includes a driving head 73 and a clampingand supporting head 74.

The head 73 includes a disk 73a with a conical periphery 73b and securedto a splined shaft 730 slidably mounted in the splined sleeve 63 andnormally urged toward the other head by a spring 75, this movement beinglimited by a pin 76 working in a' key slot 77;

The head 74 includes a disk 74a with a conical periphery 74b and mountedon a ball bearing 74c carried by a stub shaft 74d which is slidablymounted in a housing 78 but restrained from rotary movement by a pin 79in the shaft working in an elongated slot 80 in the housing. Ahand-operated feed screw 31 is journalled in the housing 78 and hasthreaded engagement with a threaded bore 82 in the shaft 74d so that thehead 74 may be moved in or out relative to the frame F of the machineand so that the cylinder 42 engaging the coned peripheries of the disks73a and 74a may be clamped therebetween, and if desired, may be keyed inplace by a pin 83 on one of the disks engaging a notch in the edge ofthe cylinder, at which time the tension of the spring 75 acting on thehead 73 and through the cylinder on the head 74 holds the partstogether. To remove the cylinder 42, the feed screw 81 is turned tocarry the head 74 toward the left as viewed in Fig. 5 until the pin 76strikes the end of the slot 77 and arrests movement of the head 73 andthereafter continued movement of the head 74 disengages it from thecylinder 42 so that the cylinder can be taken out of the machine andreplaced by another cylinder having a dilferent pin arrangement.

It is to be noted that since the waste removing brush 52 imposes nolimitations on the disposition of the pin or pins transversely of theblank, the placing of such pin or pins for waste removal from anyparticular form of carton blank is greatly facilitated, and aconsiderable amount of time in setting up the machine for a run of stockis saved.

It will, of course, be understood that the impaling pins can be mountedon a movable support other than a cylinder if such an arrangement isdesirable without departing from the invention.

I desire it to be understood that this invention is not to be limited toany particular form or arrangement of parts except in so far as suchlimitations are included in the claims.

What I claim as my invention is:

1. In a blank forming apparatus, the combination with feeding means foradvancing a blank having a waste portion therein, a frame having aseries of sets of openings, a plurality of riders interchangeablymounted in said openings to support the full portions of the blank andleave an exposed opening for that portion of the blank having the wasteportion, a cylinder rotatably mounted adjacent said riders, an impalingpin mounted on said cylinder to contact the waste portion of the blank,means to exert pressure on the advancing blank while in contact withsaid pin to impale the waste thereon, said riders extending from thetinfeed side of said cylinder, past said pressure exerting means and tothe discharge side of said cylinder, so that continued rotation of saidcylinder strips the waste from the blank as the latter is supported onsaid riders, and means for removing the stripped waste from said pin.

2. The blank forming apparatus as defined in claim 1 wherein the ridersare steel wires removably anchored at one end to one of the members ofthe frame and adjustably tensioned at the other end.

3. In a blank forming apparatus, an impaling pin-carrying hollowcylinder, heads for clamping said cylinder between them, each of saidheads having a stud shaft, means for driving one of said shafts, springmeans for urging said heads toward each other to clamp the cylinderbetween said heads, and manually operable means for moving the other ofsaid shafts lengthwise to separate said heads to permit removal of saidcylinder.

4. In a blank forming apparatus, the combination with feeding means foradvancing a blank having a waste portion therein, a frame having a pairof spaced-apart blocks, a plurality of flexible riders adjustablysecured at their ends to said blocks for supporting the full portions ofsaid blank and leaving an exposed opening for said waste portion, acylinder rotatably mounted intermediate the length of said riders andadjacent thereto, an impaling pin mounted on said cylinder to contactsaid waste 6 portion, and means to exert pressure on the advancing blankwhile the latter is in contact With said pin to thereby impale the wasteportion thereon and cause the latter to be stripped from saidrider-supported blank as the cylinder continues to rotate.

5. In a blank forming apparatus, the combination with feeding means foradvancing a blank having a Waste portion therein, a frame having a pairof spaced-apart blocks, a plurality of wire riders adjustably secured attheir ends to said blocks for supporting the full portions of said blankand leaving an exposed opening for said waste portion, a cylinderrotatably mounted intermediate the length of said riders and adjacentone side thereof, an impaling pin mounted on said cylinder to contactsaid waste portion, and means on the other side of said riders to exertpressure on the advancing blank while the latter is in contact with saidpin to thereby impale the waste portion thereon and cause the latter tobe stripped from said rider-supported blank as the cylinder continues torotate.

6. In a blank-forming apparatus, the combination with feeding means foradvancing a blank having a waste portion therein, a frame having a pairof spaced-apart blocks, a plurality of generally horizontally disposedwire riders secured at their ends to said blocks for supporting the fullportions of said blank and leaving an exposed opening for said wasteportion, attaching means for detachably and adjustably securing saidriders to said blocks, a cylinder rotatably mounted intermediate thelength of said riders and adjacent the lower side thereof, an impalingpin mounted on said cylinder to contact said waste portion, and meanslocated on the upper side of said riders to exert pressure on theadvancing blank while the latter is in contact with said pin to therebyimpale the waste portion thereon and cause the latter to be strippedfrom said rider-supported blank as the cylinder continues to rotate.

7. The combination set forth in claim 6 further characterized in thatsaid attaching means for attaching one end of said wires to one of saidblocks comprises a threaded member carried by said wires whereby thetension of the latter may be varied.

References Cited in the file of this patent UNITED STATES PATENTS1,289,679 Craig Dec. 31, 1918 1,983,708 Ruble et al. Dec. 11, 19342,020,157 Myers Nov. 5, 1935 2,127,131 Moeller Aug. 16, 1938 2,311,692Potdevin Feb. 23, 1943 2,711,676 Richardson June 28, 1955 2,734,319Billeter Feb. 19, 1956 2,778,286 Walker Jan. 22, 1957

